JP3247891B2 - Data distribution method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various types of data.
Data processing with means for receiving data
In the system, data from the provider task is
The data is distributed to multiple subscribing user tasks.
How to distribute. [0002] A local computer is a remote database.
To a large amount of information by communicating with
Access is possible. Most remote databases are
Much more possible on any local computer
As a central storage house for information
Can work. [0003] Walsh Greenwood Information
Waltion Greenwood Informatio
n Systems, Inc.)
Social Information Services (Wang F
inancial Information Services Corporation)
Detached databases are available to stock markets and other financial institutions.
The information is for information only. This database is
Real-time deals, in-store quotes, options, products,
Market information, including futures prices, fixed income data and news
Includes holdings of organizations and organizations. This database
Means that the booked computer generally has three services,
I.e. access to broadcast, inquiry and monitoring
To do. In the case of broadcasting, information is continuously transmitted to the user.
It will be broadcast to For example, New York
A stock exchange quote display service in New York
All trades performed on the stock exchange are executed
Will be communicated to all subscribers. Other broadcasting services
The Dow Jones News Service
(Dow Jones News Service) and Reuters News
Headlines received from the service (Reuters NewsService)
There is a news headline service that scrolls through. Ma
Dow Jones News Service and Reuters
・ All news items from News Service are subscribed
To the public and the news as the news is released.
Scroll through source items. [0005] Also, database subscribers may be able to access certain queries.
It can be performed. For example, a subscriber may have
And store the relevant stock in the database
You can receive the current information quickly.
Also, news items of interest identify information of interest.
By issuing a request containing a particular identifier symbol
Searchable. [0006] Finally, the subscriber has access to a remote database.
Monitor all information entering the database and provide subscribers with
You can request that only data of particular interest be transmitted.
Once again, the subscriber can access the database
To communicate [0007] Walsh Greenwood Infome
Communication Systems is for communication with personal computers
Was configured to. Therefore, the address of each communication line
In contrast, there was exactly one user. Each PC has a specific security
Appointment services and appropriate for these services
You just have to pay a special fee. Which service is
Whether the network allows the computer to use it
Send messages to each computer on each line
Configuration and confidentiality are controlled by the network's host processor.
Was treated. This allows for accurate accounting and calculations
Provided enough control to. SUMMARY OF THE INVENTION A multi-user system has a central
Many terminals connected via computer and database
Has a single communication line to the host computer
be able to. Various users in this local system
The user can reserve various services. In that state
The remote database has an accurate file for each terminal.
Needs to be maintained. In addition, a remote database
Transmits data to all subscriber terminals along a single communication line.
To the terminal that transmits, reserves, and makes a specific inquiry
Multi-user for proper distribution of data
・ It is necessary to depend on the system. The present invention is directed
Is such a multi-user system. Properly incoming data for a large number of users
Local multi-user system to distribute
Keeps a record of the booking and a record of a particular request,
Incoming data needs to be multiplexed to individual users. this
Important tasks are performed from remote databases to individual users.
Information must be achieved without unacceptably late
It is necessary. Eliminating the lag is an important part of stock market information.
Especially important in the case. One feature of the present invention is that
Various types of information so that information can be distributed quickly to
It is in. A particular mode of request from many users
Tracking nitration can be cumbersome. The present invention
According to one feature of the first provider
Task is the flow of incoming data from a remote database
Multiple data by the data type corresponding to each service.
Divide the flow. Do not monitor requests
The data flow selected in response to the
It is transmitted directly to the user's task to reserve it. Only
However, certain monitoring requests may be
Transferred to the task. Then, the provider
Tasks respond to specific monitoring requests
Split the data stream into separate data streams, and
Transfer the data flow of this to the user task. like this
In addition, simply broadcast to the user or specific, referrals
The data resulting from the
To deal with more time-consuming data distribution.
You don't have to be delayed by the tasks you need. Also,
2 provider tasks are needed for specific classes of data
Decryption can be performed. Certain queries, such as searching for news, are
Can be handled by another provider task
You. The data of the class is the monitoring request
Does not require extensive data processing based on
Require sufficient additional processing to guarantee individual tasks.
May be needed. However, quotes are sent to the first provider
It is preferable to handle by task. Users typically
Get a response very quickly in response to quotes
The first provider task
The handling of the association is not so troublesome. [0011] The information received from the database is distant.
Provided by remote databases or to all subscribers
Specific files created by local software
Format typically needs to be displayed. You
Data received by a program developed by
Access is typically limited and available
Case access requires specific programming skills and effort
Have been. Such access is on a real-time basis
Did not get. Another feature of the invention is that the provider
The data path between the task and the user task
Code modules connected to the user task
Is to be set by the Each data path is a single
Specific types of data to be transferred to the user.
The common code module contains various data reserved by the user.
Simplifies access to data types and
Operating system for a multitasking system.
Isolate from system fluctuations. operating system
Some programming variation that requires variation in
All by modifying common code modules
Can be processed for this program. Forwarded to each user
A clear data path for each type of data
This makes it easy to enter local reservations, and
Can be stopped for specific services and user programs
The ram may have access to a particular service at any point.
Resources can be restricted. Thus, the internal message
Communication traffic can be minimized. While waiting for data from the database
The amount of time the user program needs to be used is
Waiting squirrel monitored by the operating system
Can be minimized by setting The waiting list is
For each type of data for each user's task
Contains the mailbox address. The mailbox
Through the operating system to user tasks
Inform the task about the data being transferred.
You. The operating system makes each program independent.
No need to stand up and cycle through wait routines
Speeds up data distribution. Rather, the operability
System waits for many events at the same time,
Then, anything that occurs first is buried. The above functions
Are generally written in higher level languages.
Cannot be used for glamor,
Are enabled by a common code module. A data path between a provider and a subscriber
When setting, for each user task from the configuration file
Configuration list can be set. Each configuration list contains each type of
Provider tab to which requests for data are forwarded
Screen mailbox name and the task
Include instructions on whether or not to access
No. In addition, each configuration list shows that a task is
Data provider. Common code
The specific routines of the module provider are
Is restricted to a single task. Further, using a common code module,
You can set a waiting list for provider tasks.
The provider task is a request from the user task
No need to repeatedly test whether it is being made
But the operating system is simply
Monitor the provider's task mailbox against
Just do it. Also, the provider task is responsible for each service.
Provider so that you can identify each mailbox
Create a configuration list for a task. Data to subscribers
To facilitate distribution, each provider must provide
Set up a subscriber list for
The user who generated the data path can be identified. During startup of the system, the first provider
Of tasks include the information contained in the configuration list
Preferably for all other tasks. First
Only provider tasks are received from remote databases.
Access configuration files containing trusted customer access information
Access. For example, providing a monitoring service
Provider such as the second provider task described above
Tasks are independent requests from different users
Data from a remote database
You should not do quests. For this purpose
In addition, the provider task is a specific
Receive data requests and identify user tasks
Compile information that correlates to a data request
For each data request, the provider has a separate task
Whether similar requests are pending for
I do. Only if no similar requests are pending,
Certain data requests are forwarded to a remote database
You. The data is then received from a remote database.
When the provider receives the information from the compiled information,
Detects all user tasks that have requested the received data,
Data is transferred to these user tasks. Information is
Generate and compile user and symbol trees
Preferably. Each user node in the user tree
Is a list of symbols identifying the data requested by the user
Turned to Each node in the symbol tree is represented by the symbol
Indicate the user who requested the data to be displayed. The above and other objects, features and features of the present invention.
Advantages and advantages of the preferred embodiment of the invention as illustrated in the accompanying drawings.
It will be clear from the following detailed description. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a multitasking, multitasking,
Regarding the user data processing system, for example, Wong
V from Laboratories, Inc.
It can be implemented for the S system. In FIG. 1, block 2
0 is the entire operating system of the multitasking system
Figure 2 shows the system. Operating system
Is provided with a number of clear programs,
Share the operating system and
Complete the disc independently. For example, three user programs
The rams 22, 24, 26 are shown. Each user / pro
Grams are stored at respective computer terminals 28, 50 or
Is associated with 52. Inside each user program
Is called the multitasking multiuser of this system
The properties are not visible to the user. But communication between tasks
Data through the operating system.
Specific steps must be followed to set up
You. The present invention provides a remote database host
Transfer of the request to the computer 54 and the computer
And the return of data from Host computer
Hosts, such as Dow Jones or Spectrum I
Institutional Holdings (Spectrum I
All stock trades and numbers (like nstitutional Holdings)
On a number of data lines connecting to ancillary services
Collect real-time trading and market information. This information
Is a real-time stock trading, storefront, option, product
Transaction and fixed income data as well as news and
Including holdings. The remote database 34 and the user program
All communications to and from the primary 22, 22, and 26
Processed via the provider task 36. This task
Provides the data to the reserved user. Primary provider
DA 56 sends and receives data along the telephone line
Includes conventional communication software. The primary provider 56
Also, regarding what type of data is being received
First detection must be performed. For details, see Primary Provider
Will provide specific data services of which the data is a part.
To detect. The primary provider makes the initial distribution of the data
Do. All to all subscribers of the service
Most of the broadcast class data
And transmitted directly to the individual subscribing users. This class
Service is Dow Jones New Service
(Dj), New York Stock Exchange (tk), New York
Headline (nh) and Reuters New
-Includes service (rt). Figure 1 shows these broadcasting services.
Data from PIS to user programs 24 and 26
An example of the transfer path is shown. These transfer paths
Once the data route is established, the remote database
What further requests from the user program
Since they are not required, only one direction is shown.
Other data services are more complex on the provider side.
Requires logic. The primary provider is
To avoid overloading the distribution of data from
Additional tasks 38 and 40 are provided to
I have. In this example, the query class service
A copy of the data is provided by the primary provider
38. For example, the new Dow Jones
In search service (m), the remote database is the user
Specific identifiers transmitted to the database by
Respond to specific queries for news items. Inquiry pro
The binder 58 first communicates these from the user program.
Request received, similar request already pending
And if a similar request is pending
If not, route the request through the primary provider.
And transfer it to the remote database. From the service
All transferred data is provided by the primary provider 56
It is directed to the inquiry provider 58. Next, the inquiry provider
Damas examines its own records and makes the request.
The program and identify the response data exactly as
Transfer to the user program. In the example shown in FIG.
User program 22 only finds Dow Jones new search
I have subscribed to the service, but the utility of the referral provider is
Increase bookings and inquiry queries from other user programs
It increases with the number of Russ services. The last class of service is the host
Specific information for the information that the computer
Monitor data based on requests. Remote data
The base receives all data as received from that source.
Monitor the data and select the data for which the request is pending.
Select. The data is then forwarded to the requesting user
Is done. Thus, the service's monitor class is queried
Open. The monitor provider is a user
Request from the query provider and the referral provider
Just as if the request was already pending.
To a remote database that is not Most remote
Databases allow multi-user systems to be
A specific item of data in a multi-user
Transmit to the stem. When the data is received, the monitor
・ It is led to the provider. Monitor Providers
Record, and which user program needs the data
Request and determine if the user program
To the system. Market monitor data is stored in a compressed format.
Encoded in a mat. The primary provider receives
Certain data is in a market monitoring format
Only in the encoded format.
Data (mm) to monitor provider 40
You. The monitor provider then decrypts the data
And request it as one or more of the three services
Leads to a user program that has Basic market monitor
Ring Services (mm) is the price of each stock of a particular stock
Respond to fluctuations. The selected market service (sl) is stock
Respond to each transaction in the formula and identify the volume and amount of that transaction.
You. Block trading price (bt) is all above 10,000 shares
Identify transactions. Block transactions are actually broadcast classes.
Service, but with market monitoring services
The monitor is encoded by the host computer.
-It is most efficiently decoded by the provider. Further
In the future, block trading will be even more selective service
Is expected. As shown in FIG.
All services received from remote databases
3 user programs depending on the same data flow
You can make individual reservations for selected services
it can. Query class, but primary provider completes
A stock quote (qt) service is a service for all processing.
is there. Users can quickly get stock quotes
And the current system demands
Minimize the number of transfers and the number of data returned via the computing system
To facilitate quick return of market data
You. In each direction due to using a referral provider
Are eliminated. Primary provider shares
A quote request to the primary provider
Transmitted together with a sequence code identifying the same. C
Kens Code is a request for first-in / first-out storage.
Stored together with the identifier of the user program. Remote de
The database stores the data in the same order as it was requested.
And return the same sequence code with the data.
The primary provider then matches the sequence number
As long as the data identifies it from first-in / first-out storage
To the requesting user task. C
If the can number is skipped in the return data,
The next provider will either make the request again, or
Tell user program that request should be made
Can be notified. With the basic user program,
Users can request specific requests within the scope of the
Perform quests and properly display returned data
Become like However, unique proprietary, especially suited to specific needs
It is thought that the user wants to develop the program
It is. In fact, the user, as a very small part,
Programs that need to get stock market information
You might want to develop. Pension management
・ The program is an example of such a program.
U. In the past, stock market services and other data
Retrieving information from the database is flexible for programmers.
Allows little flexibility and remotes custom programs
Making it difficult or impossible to connect to a database. Book
The invention is based on the application program interface.
Source (API) to facilitate such communication.
You. This API is a function of the operating system
To make the most of the
Tasks by minimizing programming
This makes it easier to set a data transfer path between nodes. [0027] The API includes user and provider tasks.
Of subroutines that can be linked to any of
Module. API code module
When linked to a user program, the program
Simply call a routine to set up a data transfer path
Only need. Users should be able to access the underlying operating system
Need to know about system capabilities and requirements
Absent. For those, when developing the code module
Is already taken into account. In addition, user
Programs are shielded from operating system fluctuations.
Refused. The system designer must
Appropriate API code module using system variation
Change to The API code module is
Interface to the operating system
Provide the greatest benefit when using
It is also used to interface scene tasks. This
Using the method, the system designer can
API code mode when making changes to the
All you have to do is modify the Joule
The screen does not need to be modified. The specific API code module described below
Another advantage of rules is that mailboxes can be created and
Messages to those mailboxes.
Wang VS system message between tasks (I
TM) function may be fully utilized. Wong VS
On systems, the task is the operating system
Port or mailbox in the P list
Can be "struck itself". Book
In the system according to the invention, these P-lists are
The waiting list created by the code module
You. Operating system monitors P-list
And a message is received at a port in the P list
Then, the task related to the P list is notified. The result
As a result, a task program is an event (event)
It is not necessary to keep operating when waiting for the occurrence of an elephant. Oh
This feature of the operating system is
Program to monitor data requests from
From the host computer for the binder task.
User program to monitor data reception
On the other hand, it is particularly useful. When is such an event
Can also occur. The intertask communication has three types of lists.
By setting to the API code module
Processed more efficiently. 2 and 3 show the primary probe.
4 shows an exemplary list for Ida and User2.
Each task that communicates via API code module
Can be configured via the API routine with the configuration list and the waiting list.
Set. In addition, each provider task
Set up a subscriber list for each service offered
You. Before setting any data transfer path
First, the provider or user task is the primary
The configuration list needs to be obtained via the binder. Constitution
The list contains a service code for each available service.
Including code. In addition, a configuration list is provided for each service.
Before the specific task (indicated by P in the list)
Indicates whether or not the service provider. Tas
If the task is not a provider, the list will
Indicate whether you have access to the service (yes
Is Y and no is N). Each class has I
TM port or mailbox address provided,
There, the message requesting the service is forwarded
Is done. User completes request to provider
Before doing so, the provider searches its configuration list
I have to do it. Its access provided to the list
The provider based on the
Ida is on the operating system wait list.
List mailboxes that should receive requests
Request for a specific service
Providers should be set up to receive. No.
In Figure 2, for each service on the waiting list
The available state indicated by the primary provider is on the waiting list
Is ready to receive requests for each service
Indicates that As mentioned above, the waiting list is
Operating system in S system architecture
This is the p-list of the program. Once the waiting list is API code
Module, the provider program
System continues to monitor the mailbox for each service
Need not be. Rather, this clever work is on the waiting list
More handled by the operating system. [0032] The provider provides a subscriber resource for each service.
And set the list in the configuration list (* in FIG. 2).
Point) for each subscriber list start address
Data. Also, the user can use the API routine
Set the operating system wait list.
Users will have their own access to each service they have access to.
A body user port may be included. Then,
The user will receive a mailbox for the data returned from the provider.
Acts as a box. The waiting list receives the data
Includes each expected mailbox. Waiting
Each mailbox in the list is enabled or ready.
Can be set to any of the
The system is the data transferred to the available mailbox
It only notifies the task. To make a reservation for a service, the user must enter the AP
Search the configuration list in the I routine
To get the email box address. Through the routine,
Next, as shown in FIG. 5B, a reservation message is formed.
And sends the message to the specified provider mailbox.
To the office. Then the user receives the message
Operating system through a configured user port
Wait to be notified by. The reservation message is
The provider task menu is provided by the operating system.
The provider task is forwarded to the
The page is notified that it has not been received. Next
The provider processes the reservation list and returns the user
Service box and other data for the service.
Service provider's subscriber list
Good. The other data mentioned above is the subscriber's workstation
Number, user I. D. And a key. In the configuration list, for each service,
By defining a special provider mailbox,
In this system, each user program is reserved by the user
Independent data paths for several services
Make it configurable. Host processor is customer
(Customer) contains a specific user program
Access to data for specific services.
Is acceptable, but in the local system,
Some users have failed to make a reservation or
Either at any time without affecting the screw
May cancel your reservation for this service. So
Results in internal messages passing through the operating system.
Storage traffic can be minimized. Host
The processor is the user in the local system as a subscriber.
Does not inform the status, and therefore the reservation in the system
And revocation do not affect the user's customer status. To speed up access to configuration information
A clear configuration list for each task in the system
Generate Each class has an operating system
Transfer further data from the configuration file through the
Efficient access to the list without need
Can be acquired. But for every task
Multitasking system with easy access to global memory
In the system, no individual configuration list is required.
Rather, the information can be obtained from a central file. I
However, each task has the properties specified by the system.
Ida mailbox addresses and each available service
Immediate access to unique access information
It is important to have access to Configuration / Standby and subscriber list and data
API Sourch to transfer data efficiently
A more detailed explanation of how to create
You. First receive all information from remote database
Primary provider 56 is a remote database
A central program for initiating programs for transfer from
It has not been selected as a program. Primary provider's
As part of the initial processing, a configuration called CNFINIT was opened.
Call the start APT routine. CNFINIT is a disk
Read the configuration file from the storage device. Primary provider is
In addition, the communication line is started. Host computer 34
Detects that the line is in use,
By sending a service list for the customer
Respond. Primary provider from remote database
And information received from the disk storage device
To create the configuration file shown in FIG. The first item in the configuration file contains the data
A key for each task to be included in the transfer. Real
The key is a logical name for recording the configuration of each task
It is a name. Keys PRIPRO, INQPRO and MON
PRO is a primary provider, query provider and monitor
-The name given to each provider.
Another key, ADMIN, is specific to the particular needs of the system.
Implementation of the back-office management program, if required
Allow lines. Such a program has a key specification
And services by specific tasks and workstations
Access to the area. The files associated with the first four keys of the file
The program is typically a provider program that runs in the background.
It is a program. In addition, three additional keys, US
ER1, USER2 and USER3 are the three shown in Fig. 1.
Of each user program.
Of course, this system is not
It is not limited to grams. These programs
Is typically a subscriber, foreground
Calculation or not. The terminal ID field is stored in a remote database.
Is an identifier for knowing each user in the system.
You. Databases grant rights to specific services
For each service, identify
Charge. Only user tasks need terminal IDs
But the reason is that only genuine consumers of data
Because it is. The supplier can simply store the remote database.
The terminal ID is not required.
The terminal ID also acts as an alternative key. Far
The remote database does not know the first key and the terminal
Send the configuration record tagged by ID. Terminal
The ID is the ID of the new or expanded service
When requesting a resource, assign it from a remote database.
Can be When each task is initialized, a task number
Is sent to the primary provider along with the key. State file
Field indicates whether a key has been used and
The work in which the related task is used
The station number is also indicated. The status field is the background
Can indicate that the task is running. Work station
Option fields are used by administrative programs.
May use certain keys and corresponding privileges
Limit available workstations. The key is
Workstations indicated by an asterisk
Or from a list of options
Can be limited. In the lower part of FIG. 4, the service field is
Has been deployed. This list of fields is for each key
In contrast, for each of the defined services,
Define related program roles. The program is
One of three roles for a given service
Can have. It may have full reservation privileges (Y)
it can. Service (P) provider or service
It is possible that there is no right to the service (N). Far
Subscriber rights granted by the remote database are
Indicated by y for accepted reservations and n for denied reservations.
Shown and oval by local administrative program
Can be controlled. The role of the provider depends on the system designer.
Defined. During CFNINIT, the primary provider 3
6 is also available from the disk storage device to the provider mailbox.
Get a file. Professional for each service
The binder mailbox is shown in FIGS. 2 and 3.
So that it is later included in each configuration list for each task.
Provider mailbox file and configuration list
Using the information from the primary provider, the API code
・ The configuration resources to be used by each task using the module
Build a prototype of the strike. Prototype configuration
The list contains one record for each defined service.
Records, and each record is a mailbox of the service provider.
Including box. This mailbox is the ITM port name
It is. Configuration file and prototype configuration list
With the primary provider, SCLINIT
Call up your own personal configuration list
generate. By providing that key PRIPRO
Primary provider, based on the prototype list,
Access code from configuration file for each service
Take P, Y or N and get its configuration list.
When P is indicated for a service in the configuration list
The provider, as a mailbox, a configuration list
Set the provider mailbox indicated in the
I do. Providers also provide subscribers with each service.
Set list and set current list size to zero
You. In addition, each set by the provider program
Mailboxes are used for tasks that act as waiting lists.
On the other hand, the operating
It is placed in the system's p-list. In the waiting list
The waiting state for each provider's mailbox is used.
It is set to a usable state. Finally, the primary provider
The program calls API routine SCLWAIT
To the operating system,
One of the available mailboxes on the waiting list
Wait for instructions that the message has been received
To inform. When the primary provider is initialized,
Is also initialized. To this end, each task is
By calling the PI routine SCLINIT,
Set the operating system wait list.
As shown in FIG. 3, the waiting list initially has three false
Similar services, emergency (em), work
Including station (WS) and timer (tm)
Can be. Emergency port is high on the waiting list
Task receives urgent message in priority order
Be able to do it. Workstation service
The user program uses the API code module
Workstation using the waiting list set by the
Wait for an upcoming event at the terminal
To be able to This fake service allows you to
The program, for example,
While waiting for a vent to occur at the terminal, the data
You do not need to delay receipt Finally, a pseudo-timer
The service allows the program to go through a waiting list
It is possible to set a timer. Therefore, you
How long the program waits for other events to occur
It becomes possible to be able to limit. During the SCLINIT routine, the task
Also provide the information needed to reserve system services.
Get the configuration list to serve. Tasks have their configuration list
From the primary provider task,
The API subroutine is that all tasks follow this
The default mix configured as a user of the configuration data
It has a configuration list. The user enters the mailbox "c
fcf "to reserve configuration data with the primary provider
You. The configuration reservation message is sent to the primary provider
Operating box when the toolbox "cfcf" is reached
System in the SCLWAIT routine
Call the next provider. Mailbox "cfcf"
In response to the reservation message for configuration data in
The provider will provide the user key provided in the booking message
To obtain an appropriate record of the configuration file using
A copy of the type's configuration list contains each service for that key.
Attach an appropriate access code to the service. Primary provider
Da Reserves Customized Configuration List Mailbox
, Return to $ 20cf and change the master configuration file
Update to indicate that a particular key is being used. Using the SCLINIT routine individually
By the way, each task is a complete configuration list and empty
But Emergency, Workstation and Timer
Having a waiting list for fake services
Can be. The data path shown in FIG. 1 is not yet set
Absent. To set up a route, each provider has a routine
PRVOPEN is called, and the routine is initially empty.
Set a subscriber list that is Automatically PRVOPE
During N, both provider tasks and subscriber tasks are
Call the routine SCLOPEN. Routine SCLOPE
Call N. Provision by routine SCLOPEN
The task is the service specified in the configuration list.
Set that mailbox to be open to
In addition, the subscriber task saves the mailbox, for example,
Added task count and service code like 20gt
Set to something. Specific tasks for the service
Any future messages received by
Received in the designated mailbox. A task is a subscription to a service.
Act as a provider of services and other services. An example
For example, a monitor provider may provide a market monitoring service.
Subscribers for SM and market monitoring services
Smm, select kanba service and block trading service
Act as a bt provider. Similarly, the query
Ida is a subscriber to the news search service NR and
The provider of the news search service nt
You. Individual SCLOPEN routines for each service
Need to call. In the SCLOPEN routine, the
Is placed on the waiting list for the task
But set to "negative". Next, the provider
The task waits by retrieving SCLLISTEN.
A specific mailbox in the list is enabled.
Is The subscriber task typically starts with the routine S
Call CLSUBSCRIBE. According to the routine
The reservation person constructs a reservation message as shown in FIG. 5B.
And sends the reservation message to the professional
Transmit to binder mailbox. Subscriber messages are
Return mailbox for the service at the subscriber
And whether the message is a subscriber or a cancellation
And a flag to indicate. The message also contains the task number
Provider, including issue, user ID and user key
Adds the subscriber to the subscriber list for the service
To respond to the message. Next,
Entrants typically enter SCLLISTEN by entering
The associated mailbox on the waiting list is available
Set. In the subscriber mailbox by the provider
The returned data is then intercepted in the mailbox.
API routine SCL for the user to obtain the information of the deviation
It can be read by inputting READ.
However, usually the user enters the routine SCLWAIT
To one of the mailboxes in use for that
Operating system when an event occurs
A signal is sent to notify that effect. Once the user has reserved the service, the AP
SCLSEIND routine in I code module
A particular resource in a remote database via a provider.
Can perform quests. Use this routine
And the user program becomes as shown in FIG. 5A.
Generate a message. FIG. 5A shows the service and the specific
Flags and messages appropriate for service and request
Including sage. Under SCLSND, the provider's
The mailbox is obtained from the subscriber's configuration list,
One message is sent. Message depends on provider
Inquiry provider or monitor provider
, The provider is transmitted to the primary provider and
Custom messages to be transmitted to the remote database
generate. SCLO is the primary message
Through the PEN and SCLSUBSCRIBE routines,
You can send the previously set route. Finally, if the data is the host processor 34
Once received by the provider, the provider
The data must be sent to the user who has booked it. Prova
By calling the PRVSEND routine,
The provider will provide a reservation list for a particular service on Saturday,
And sends the received data to the subscriber. Alternatively, moni
Providers such as data collectors can access data via their own internal lists.
To detect mailboxes that need to transmit data
Can be. In addition to the routine described above, for example,
SCLTRM, SCLSUB, which is the opposite of Sclinit
SCLCACEL which is the opposite of SCRIBE, SCLLI
SCLIGNORE, which is the opposite of STEN, and SCL
Reverse approach like SCLCLOSE walking in reverse of CPEN
There is. The additional function SCLLIST allows the user
SCLWAIT for events defined by many users
Can be added to the waiting list to use. work
This fake service like station fake service
(US) may delay receipt of incoming data
User program can eliminate tedious waiting processing
To do. The detailed description of the monitor provider task
The following is provided with respect to FIGS. Monitor pro
Bida is a market monitor, selection quote and block trading service.
Need to save subscriber list for each of the services
In addition, the host should monitor specific market codes.
Forward specific request and receive from host
A list of subscribers to ensure that data is properly distributed
Needs to be correlated to the generated code. For that purpose
Thus, the monitor provider has the symbol tree shown in FIG.
It depends on the user tree shown in FIG. 7A. Each tree is 2
Hexadecimal threaded tree,
It additionally contains a pointer to the linked list. In the case of a symbol tree, each node of the three is:
Specific security being monitored (confidential, securities)
Identifies a symbol that acts as an identifier to Each of the tree
The node is responsible for the user who has requested information for the symbol.
Orient the combined list. In the user tree
Each node of the tree is
Service for each of the nodes
Is the combination of symbols being monitored for the user
Oriented lists. Coupled to each user node
For each symbol in the list, the symbol tree contains
There is a corresponding symbol node. The user tree contains additional user tasks.
As they subscribe to monitor provider services
Grow. The signal tree is used to identify specific requests within each service.
As the number of birds increases, they grow. In each case,
First user to reserve or first signal to be requested
Acts as the root of the tree. afterwards
Whether the alphabet value of the new node is low or high
Therefore, additional nodes are added to the left or right of the predecessor node.
Be added. Thus, alphabetically the symbol tree
At the root of the symbol MMM. All symbols preceding N
Found on the left side of Lee. Using a binary tree
Allows you to search the list for specific items
Is significantly reduced. 20 users
Or 50 symbols per user are listed in a tree
This search time is especially important when searching for Each node of the symbol tree is listed in FIG.
Includes information that has been Each node has a security symbol
And the conditions under which that security is traded, and from the host
Including the most recent price received for the security.
No. In addition, an entry on the user list associated with the node
It also contains a pointer to the end user. Combined
Pointers to each of the lists and in such a list
Is indicated by a dotted arrow in FIG. 6A. Combined
List is added to the list,
Double-bonded to facilitate removal and. each
Pointers to the left and right children of the node are the parent of the node.
Is provided with a pointer to These poi
6A are indicated by solid arrows. By pointer
Tree threading to the parent
Easy tree reorganization when adding or removing symbols
Abbreviated. Each user node in the combined list has a special
Include services for which certain users have requested symbols.
No. Service minding included in each symbol node
The (service minding) table shows the combined user list
Identify all of the services included in the list. Each user node in the user list is
7b. Each node is a root
Subscriber reservation message in SCLSUBSCRIBE
Return mailbox identified in the
It contains the user's terminal ID and the user's key. Change
In addition, each node has a list of symbols associated with that node.
It contains pointers and pointers to the children and parents of the node.
In addition, the user node has its own service
Includes a trading table. This binding table contains a specific
All services reserved by the user are listed
You. As illustrated by user 7 in FIG. 7A,
Certain users are pending to have user nodes
It is not necessary to have a specific symbol request for. [0061] The user can use SCLSUBSCRIBE.
When you book a service, the monitor provider
Traversing the tree, user nodes are assigned to the task
It is determined whether or not it has already been set. Set
If so, a new service reserved by the task
Is added to the service binding table. Set
If not, a new node leaves the tree
Will be added as Thereafter, according to the SCLSEND routine,
Tasks are monitored by a specific symbol for that service.
Can be requested. Sign on tree
Request sent to host processor before adding
Received an acknowledgment from the host in the form of a price
Must be done. The same symbol in the same service comes first
If not requested, the request is
It is only sent to the processor. Make this decision
In the first place, the monitor provider must first write
Scan the symbol tree for issues. Provider is the symbol
If the location is specified, check the service
Inspection, required symbol for desired service
It is determined whether or not. Symbols and services appear in the symbol tree
If the user finds
The symbol is added to the combined user list and the user
Added to the combined symbol list of the node. However,
If the issue and service are not located in the symbol tree
Is a request to the host. When a request is made to the host
Will give the request a sequence number,
Is transmitted together with the request. E
The strike acknowledges the request on a first-in / first-out basis
(Acknowledge) and return the sequence number. Affirmative response
Requested to determine if
The symbol is in the add pending queue shown in FIG.
Placed in Each node in this queue is required
Indicates the sign following the power. Sequence number is required
Included with the symbol. In addition, each node in the queue
Points to a user node that may be included in the list. When an acknowledgment is received, the symbol node
Removed from the queue and pointed to the user node
Is forwarded to that symbol's node in the symbol tree.
You. The symbol does not already have a node in the tree
In that case, the node is set. In addition, user tree
Node in the combined symbol list in the
Of users. Acknowledgment sequence number received out of order
The system will fail the skipped request
New request to the same symbol
And transmit. The symbol, along with the new sequence number,
It is placed at the end of the pending queue. In addition,
Is clocked. Acknowledged by this counter
Endless loop request for unsigned symbols
3 requests to avoid being done
Re-transmission. The user is asked to delete the symbol from the service
Request, the user tree is traversed and the user's
Location is identified and its symbol removed from the combined list
Is done. The symbol tree is then scanned for that symbol.
And the user is removed from the combined list. Sa
In addition, the combined list is scanned to locate the user.
User and the user is
It is determined whether or not this is the last one that contains a number. so
If the service is a symbol node
Removed from the routing table. Then traverse the symbol tree
Whether a particular service is pending for a signal
When deciding whether to update your minding table,
So, scanning the combined user list is
unnecessary. User list to which deleted users are combined
If it is the last node in the list,
Node is completely deleted. Also, delete request
Is sent to the host processor. The deletion request is properly received by the host.
If it is not torn and processed
Expect hosts to be distributed in the future
Updates may be received in the future. Sign tree
When scanning to locate the user of the data,
The position of the corresponding signal node is not specified. That
In such cases, the removal request will be
Sent to Sassa. Symbol when information is received from the host
Is found in the symbol tree, the combined user
The list should be scanned to receive specific data
A user is identified. Data traverses the user tree
To the appropriate mailbox as determined by
Sent to these users. If the user program is SCLCANCEL
Call the routine and monitor the cancellation message
When sending to Ida, sign the symbol associated with the user
A user tree is required to clear the tree
You. When a message is received from the routine, the user tool
Lee is scanned for that user and the combined symbol s
By scanning the symbols, the symbols are identified. Then
The symbol tree is traversed for these symbols and the user
Is removed from the combined user list. Again, Yu
If the user is the last user to be associated with the symbol
The symbol is removed from the symbol tree and the delete request
Is sent to the host. The block transaction symbol bt is a sample tree.
Note that it is not included in any of the above. That buried
The reason is that the block trading service broadcasts (broadcast
G) Because it is a service. Block trading service
Is encoded using market monitor data,
Handled by monitor provider only. But,
As a broadcast service, block transactions allow users to subscribe
API routine PRVSUBSCRI to add to the list
BE and PR to distribute data to listed users
With VSEND, it is easily processed. In the above, the present invention has been described using a preferred embodiment.
However, if you are an expert in this technical field,
Depart from the spirit and scope of the present invention as defined in the claims.
Various changes can be made in form and details without any
Will be able to understand. For example, the present invention
Basically, multiple tasks in one processing unit
Is a multitasking system where
However, these tasks are still subject to certain features of the present invention.
Can be distributed to other processing units while including
it can. Furthermore, the invention has application to non-market data.
ing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of the software architecture of a system embodying the present invention. FIG. 2 is a diagram showing a configuration list, a waiting list, and a subscriber list stored in a provider task memory by a common code module of an application program interface (API) of the system shown in FIG. 1; FIG. 3 is a diagram showing a configuration list and a standby list stored in a user task memory by an API. FIG. 4 is a diagram showing a configuration file searched through an API by a task of a primary provider. FIG. 5 is a diagram showing a message format of a message composed of FIGS. 5A and 5B and transferred by an API; 6 is a diagram showing the data structure of the symbol tree in the monitor provider shown in FIG. 1 and composed of FIGS. 6A and 6B. FIG. 7 is a diagram showing the data structure of a user tree in the monitor provider, which is composed of FIGS. FIG. 8 shows an additional pending queue at the monitor provider.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-49-95501 (JP, A) UK Patent Application Publication 148973 (GB, A) UK Patent Application Publication 2161003 (GB, A) (58) Int.Cl. ⁷ , DB name) G06F 13/00

Claims (1)

(57) [Claims] In a multitasking data processing system having means for receiving various types of data, a provider
A method for distributing data from a task to a plurality of user tasks subscribing to the data, wherein a common code module coupled to each user task allows the provider task and the user task to be distributed. Setting a specific data path for the type of data to be transferred to a single user; and the provider task directs the flow of data from a remote database to a plurality of data flows according to the type of data. And transferring the plurality of data streams to the user task via the set data path. 2. The method of claim 1, wherein the operating system
Monitoring a mailbox to a user task for each type of data with a waiting list set via the common code module in the system, and for the user task the data being transferred to the user task The method further comprising the step of: 3. 3. The method of claim 2, further comprising generating a configuration list from a configuration file for each user task when setting the data path, wherein each configuration list includes a request for each type of data. The name of the provider / task / mailbox to be forwarded,
Indicating whether the task has access to a particular type of data. 4. 4. The method of claim 3, wherein each configuration list indicates whether the task is a provider of data to another task, and restricts a specific routine of the common code module provider to a provider task. The method further comprising: 5. 4. The method of claim 3, wherein
Monitoring the mailbox to the provider task for each type of data with the waiting list set up in the system via the common code module;
Notifying the provider task of data being transferred to the provider task. 6. 6. The method of claim 5, further comprising the step of generating a configuration list from a configuration file for each provider task, wherein each configuration list is to forward a request for each type of data to a provider task mail. A method comprising including a name of a box. 7. 6. The method of claim 5, further comprising, for at least the provider task, generating, for each type of data, a reservation list identifying a task to receive that type of data. 8. 3. The method of claim 2, wherein
Monitoring the mailbox to the provider task for each type of data with the waiting list set up in the system via the common code module;
Notifying the provider task of data being transferred to the provider task. 9. The method of claim 1, further comprising the step of, for each type of data, generating, in the provider task, a reservation list identifying a task to receive the type of data. 10. 2. The method of claim 1, further comprising generating a configuration list from a configuration file for each user task when establishing a data path, wherein each configuration list includes a request for each type of data. A method comprising: a name of a provider task mailbox to be transferred; and an indication whether the task has access to a particular type of data. 11. 2. The method of claim 1, wherein the data path is set by a common code module routine based on system configuration information available to the common code module routine, the routine comprising:
A method characterized by being invoked by a user task regardless of the provider task architecture. 12. The method of claim 1, wherein the configuration information comprises:
That it is available via a configuration list that includes the name of the provider task mailbox to which requests for each type of data should be forwarded and an indication of whether the task has access to the particular type of data. Features method. 13. 3. The method of claim 2, further comprising the step of including in the waiting list events identified by the user other than data transfer from a provider task. 14． 2. The method of claim 1, wherein a first type of data stream is forwarded to a particular user task by a content of the data stream, and a second type of data stream is generated from a list of user tasks. A method characterized by being transferred to all user tasks. 15. A method for distributing data from a provider task to a plurality of user tasks subscribing to the data in a multitask data processing system having means for receiving various types of data, the method comprising: Setting a specific data path between the provider task and the user task for the type of data to be transferred to a single user in response to a call; Splitting a data stream from a remote database into a plurality of data streams according to the type of data, and transferring the plurality of data streams to the user task via the configured data path. A data distribution method, characterized in that: 16. 16. The method of claim 15, further comprising: generating a configuration list from a configuration file for each of the provider task and the user task when establishing a data path, wherein each configuration list comprises: , A name of a provider task mailbox to which requests for each type of data are to be forwarded, and an indication of whether the task has access to a particular type of data. 17． 17. The method of claim 16, wherein a waiting list set in the operating system monitors mailboxes to the provider task for each type of data, from the user task and from the user task.
The method further comprising identifying a request for a task to identify data being transferred to the user task. 18. 16. The method of claim 15, wherein a waiting list set in the operating system monitors mailboxes to the provider task for each type of data, from the user task and from the user task.
The method further comprising identifying a request for a task to identify data being transferred to the user task.